#include <stdio.h>
int fib(int n)
{
    if(n == 0 || n == 1)
        return n;
    return fib(n - 1) + fib(n - 2);
}

int main()
{
    int n;
    scanf("%d", &n);
    printf("NO%d=%d\n", n, fib(n));
    return 0;
}